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Even theories change (1 of 4)

Image caption:Science is always a work in progress and even theories change. For example, in the 1600s classical mechanics was the accepted explanation of the movement of objects both in space and on Earth.

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Even theories change (2 of 4)Then classical mechanics was one-upped by Albert Einstein's theory of special relativity because it explained more phenomena.

Even theories change (4 of 4)General relativity seems up for a change. For example, it doesn't mesh with what we know about the interactions between extremely tiny particles. Will physicists develop a new theory that simultaneously helps us understand the interactions between the very large and the very small?